ダウンロード数: 26
このアイテムのファイル:
ファイル | 記述 | サイズ | フォーマット | |
---|---|---|---|---|
1757-899x_1249_1_012027.pdf | 754.59 kB | Adobe PDF | 見る/開く |
タイトル: | Grain orientation dependence of deformation microstructure evolution and mechanical properties in face-centered cubic high/medium entropy alloys |
著者: | Yoshida, Shuhei https://orcid.org/0000-0001-7798-3883 (unconfirmed) Fu, Rui Gong, Wu Ikeuchi, Takuto Bai, Yu Feng, Zongqiang Wu, Guilin Shibata, Akinobu Hansen, Niels Huang, Xiaoxu Tsuji, Nobuhiro https://orcid.org/0000-0002-2132-1327 (unconfirmed) |
著者名の別形: | 吉田, 周平 池内, 琢人 白, 玉 柴田, 暁伸 辻, 伸泰 |
発行日: | 2022 |
出版者: | IOP Publishing |
誌名: | IOP Conference Series: Materials Science and Engineering |
巻: | 1249 |
論文番号: | 012027 |
抄録: | This study revealed characteristics of the deformation behavior in high/medium entropy alloys (HEAs/MEAs) with face-centered cubic (FCC) structure. A Co₆₀Ni₄₀ alloy and a Co₂₀Cr₄₀Ni₄₀ MEA having low and high friction stresses (fundamental resistance to dislocation glide in solid solutions), respectively, but similar in other properties, including their stacking fault energy and grain sizes, were compared. The MEA exhibited a higher yield strength and work-hardening ability than those in the Co₆₀Ni₄₀ alloy at room temperature. Deformation microstructures of the Co₆₀Ni₄₀ alloy were composed of coarse dislocation cells (DCs) in most grains, and a few deformation twins (DTs) formed in grains with tensile axis (TA) nearly parallel to <111>. In the MEA, three microstructure types were found depending on the grain orientations: (1) fine DCs developed in TA~//<100>-oriented grains; (2) planar dislocation structures (PDSs) formed in grains with other orientations; and (3) dense DTs adding to the PDSs developed in TA~//<111>-oriented grains. The results imply difficulty in cross-slip of screw dislocations and dynamic recovery in the MEA, leading to an increase in the dislocation density and work-hardening rate. Our results suggest that FCC high-alloy systems with high friction stress inherently develop characteristic deformation microstructures advantageous for achieving high strength and large ductility. |
記述: | 42nd Risø International Symposium on Materials Science: Microstructural variability: Processing, analysis, mechanisms and properties 5–9 September 2022, Department of Civil and Mechanical Engineering, Technical University of Denmark, Denmark |
著作権等: | Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. |
URI: | http://hdl.handle.net/2433/279063 |
DOI(出版社版): | 10.1088/1757-899x/1249/1/012027 |
出現コレクション: | 学術雑誌掲載論文等 |
このアイテムは次のライセンスが設定されています: クリエイティブ・コモンズ・ライセンス